ITALIC 8.0

Rhizocarpon oportense (Vain.) Räsänen

Revista Sudamer. Bot., 7: 85, 1942. Basionym: Rhizocarpon viridiatrum var. oportense Vain. - Lichenogr. Fenn., 2: 285, 1922.

Synonyms:

Distribution: C - Sar. S - Si (Ottonello & Puntillo 1995).

Description: Thallus crustose, episubstratic, areolate, grey-green to grey-yellow, forming 2-10 cm wide patches delimited by a well-developed dark prothallus, the areoles 0.4-1.5 mm wide, contiguous or dispersed on a dark hypothallus, at first flat, then more or less convex. Medulla white, I-. Apothecia lecideine, black, developing between the areoles, 0.5-1.4 mm across, more or less round, with a flat to strongly convex disc and an initially thick and well-evident, finally sometimes excluded proper margin. Proper exciple red-brown in outer part, paler within, the pigmented parts K+ purple-red; epithecium reddish brown, inspersed with black granules, K+ purple-red; hymenium colourless to very pale brown in upper part, 110-130(-140) μm high; paraphysoids strongly coherent, richly branched and anastomosing, the apical cells clavate; hypothecium dark brown, 100-250 μm high, K-. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus that is K/I- in lower part and K/I+ blue near the apex, lacking an ocular chamber, Rhizocarpon-type. Ascospores strongly muriform, dark brown, ellipsoid, 24-40 x 12-20 μm, halonate at least when young. Photobiont chlorococcoid. Spot tests: medulla K-, C-, KC-, P- or P+ orange-red. Chemistry: cortex with rhizocarpic acid, medulla with stictic acid or without lichen substances.

Note: a species of the southern European mountains found on exposed siliceous rocks.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

INDEX FUNGORUM GBIF

Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (8089)